Basics of gstreamer pipeline

[Praveen Adi]

Thanks Kris for the information.

On Thu, Nov 1, 2012 at 7:29 AM, Krzysztof Konopko <
krzysztof.konopko at youview.com> wrote:

> Please note though that "ffmpegcolorspace was removed and replaced with
> videoconvert." in GStreamer-1.0.
>
> See
>
> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/chapter-porting-1.0.html
> for more details if you intend to use 1.0.
>
> Kris
>
> On 31/10/12 20:14, Praveen Adi wrote:
> > Hi Tim,
> >
> > Thanks for the detailed answer.
> > It really helped me in getting a better picture.
> >
> > Regards,
> > Praveen
> >
> > On Wed, Oct 31, 2012 at 7:27 PM, Tim-Philipp Müller <t.i.m at zen.co.uk
> > <mailto:t.i.m at zen.co.uk>> wrote:
> >
> >     On Wed, 2012-10-31 at 18:17 +0900, Praveen Adi wrote:
> >
> >     Hi,
> >
> >     > Can some please explain me the following:
> >     >
> >     > In the pipeline,
> >     >
> >     > gst-launch videotestsrc ! ffmpegcolorspace ! ximagesink
> >     >
> >     > What cololorspace does videotestsrc  produce here?
> >
> >     It will query ffmpegcolorspace for what it supports, which in turn
> will
> >     query ximagesink for what it supports (so that what ximagesink
> supports
> >     can be prefered).
> >
> >     It will likely produce whatever colorspace/pixel layout ximagesink
> >     returns first in the caps it returns from its get_caps() function.
> >
> >     > What colorspace conversion is ffmpegcolorspace doing?
> >
> >     If videotestsrc can produce every format ximagesink could possibly
> >     support, then no conversion will be done. ffmpegcolorspace will
> operate
> >     in passthrough mode.
> >
> >     > What colorspace is ximagesink accepting and where is it presenting,
> >     > Framebuffer??
> >
> >     It depends on the driver/card. It will be determined at runtime what
> >     formats are supported. It's likely going to be some RGB format.
> >
> >     You can see the caps negotiated if you pass -v to gst-launch.
> >
> >     > Here we don't mention any properties for the plugin, but still how
> do
> >     > they co-work?
> >
> >     Not sure I understand the question, could you rephrase it?
> >
> >     Cheers
> >      -Tim
> >
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> >
> >
> >
> >
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